Explanation: Until the mid-20th century the largest impediment to trade between area "1" and area "2" on the map was climate. The Sahara Desert was a major impediment to trade. True, there were Trans-Saharan trade routes for centuries, but there is no denying that the desert was an inconvenience at the very least.
A. Ida B. Wells He urged African Americans to protest by refusing to ride street-cards, to stop buying from white owned stores and only buy from black owned stores
